Rothenberger Plumber's Soldering Mat

In-Depth Look

Soldering and brazing copper pipe involves directing a blowtorch flame at temperatures well above the ignition point of timber, plasterboard paper and insulation materials commonly found in domestic properties. A soldering mat is the first line of defence against accidental fire damage, and the Rothenberger mat is one of the most widely used options among UK plumbers.

Why It Matters

House fires caused by plumbing work are not as rare as they should be. A blowtorch flame can reach over 1300 degrees Celsius, and timber joists can begin to char at temperatures as low as 120 degrees Celsius. The gap between the joint being soldered and the nearest combustible surface is often just centimetres. Positioning a soldering mat behind the work area is a basic but critical safety step that takes seconds and prevents serious consequences.

Practical Use

The mat is flexible enough to be positioned flat against a wall, wrapped around a pipe, or draped over a joist. In tight spaces under floorboards or inside boxing, it can be folded to fit. Over time, the surface will discolour and harden from repeated heat exposure, but the protective properties are maintained. Most plumbers replace their soldering mat when it becomes too stiff to position easily, which is typically after several months of daily use.

Verdict

The Rothenberger Soldering Mat is inexpensive, effective and essential. There is no excuse for soldering without one. It should be one of the first items any plumber buys and one of the most frequently used items in their kit. A non-negotiable piece of safety equipment.

How It Compares

A soldering mat is a heat-resistant sheet that protects the wall or surface behind a pipe joint while you solder or braze copper. Rothenberger sells plumbers’ soldering mats in more than one size, and they are described as asbestos-free heat-resistant mats. The temperature rating is on the label of each mat, so read the label for the one you have.

The mat is held behind and around the joint so the flame does not reach the surface behind it. It is one part of working with a gas torch, not a replacement for the safety steps around it.

A kit for freezing pipes is the Rothenberger Rofrost Rapid pipe freezing kit, which does a different job. Solder-free options include the Speedfit 15mm push-fit elbow and the Yorkshire Tectite Sprint push-fit coupling. Cutting tools include the Rothenberger Pipeslice 15mm copper pipe cutter and the Monument Masters XV pipe bender. Our guides to tools for plumbers and copper vs plastic pipe cover the wider picture.

Common Questions

What does a soldering mat do? It shields the wall or surface behind the joint from the flame.

Where should I place it? Put it behind and around the joint, and hold it so it does not move while you work. Follow the instructions for the way to position it.

Is soldering safe with a mat in place? Not on its own. A mat is one protective step. Keep a fire extinguisher or water to hand, clear flammable items away, follow the torch maker’s instructions and let the work cool before you touch it.

Can I use it with a gas torch for brazing? Check the temperature rating on the label before you do. Follow the instructions for the mat and for the torch.

When should I replace it? Replace it if it is damaged, frayed or contaminated. The label gives the maker’s guidance.

Hot work and gas torch use should follow the manufacturer’s instructions. Use a competent plumber if you are unsure.